Residual Error
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Deviation

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J. Jonssonius - 1644

Orcadeum et Schetlandiae accuratissima descriptio

1421
1 : 376,000
1 : 400,000
42.8

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Simple rotation of Pont-derived maps is not appropriate. Errors of rotation were not primarily caused by errors in bearings.
(See Fig. 1)

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